EP 1398780 A2 20040317 - Dielectric recording apparatus, dielectric reproducing apparatus, and dielectric recording / reproducing apparatus
Title (en)
Dielectric recording apparatus, dielectric reproducing apparatus, and dielectric recording / reproducing apparatus
Title (de)
Dielektrisches Aufzeichnungsgerät, dielektrisches Wiedergabegerät und dielektrisches Aufzeichnungs-/Wiedergabegerät
Title (fr)
Dispositif diélectrique de reproduction, dispositif diélectrique d'enregistrement et dispositif diélectrique d'enregistrement/reproduction
Publication
Application
Priority
JP 2002265930 A 20020911
Abstract (en)
A dielectric recording / reproducing apparatus (3) is provided with: a probe (11) for applying an electric field to a dielectric material (17); a return electrode (12) for returning the high frequency electric field for data reproduction; an inductor (L) placed between the probe and the return electrode; an oscillator (13) which oscillates at a resonance frequency determined according to the inductor and a capacitance formed in the dielectric material just under the probe; a switch (30) for switching circuit connections depending on whether data recording is performed and data reproducing is performed; a recording signal input device (31) for converting data to be recorded to generate a recording signal; a direct current voltage generation device (32) for generating a direct current bias voltage to be applied to the dielectric material; a frequency-amplitude demodulator (33) for demodulating an oscillation signal of the oscillator having the frequency that is changed depending on the capacitance owned by the dielectric material just under the probe; and a signal detector (34) for detecting data from the demodulated signal.
The voltage generation devices (31,32) generate a voltage corresponding to the data to be recorded and DC bias voltage which is applied to a dielectric material (17), respectively. A voltage application device combines the generated voltage and applies to a probe (11) for generating an electric field to the dielectric material. Independent claims are also included for the following: (1) dielectric reproducing apparatus; and (2) dielectric recording/reproducing apparatus.
IPC 1-7
IPC 8 full level
G01N 13/10 (2006.01); G01N 13/20 (2006.01); G01Q 60/00 (2010.01); G01Q 60/46 (2010.01); G01Q 80/00 (2010.01); G11B 9/00 (2006.01); G11B 9/02 (2006.01); G11B 9/06 (2006.01); G11B 9/14 (2006.01); G11B 11/08 (2006.01)
IPC 8 main group level
G01Q 90/00 (2010.01)
CPC (source: EP US)
B82Y 10/00 (2013.01 - EP US); G11B 9/02 (2013.01 - EP US); G11B 9/06 (2013.01 - EP US); G11B 9/14 (2013.01 - EP US); G11B 9/1409 (2013.01 - EP US); G11B 9/149 (2013.01 - EP US); G11B 11/08 (2013.01 - EP US)
Citation (applicant)
- US 5777977 A 19980707 - FUJIWARA ICHIRO [JP], et al
- US 4489278 A 19841218 - SAWAZAKI NORIKAZU [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1398780 A2 20040317; EP 1398780 A3 20060329; EP 1398780 B1 20100804; DE 60333616 D1 20100916; JP 2004101440 A 20040402; JP 3701268 B2 20050928; US 2004090903 A1 20040513; US 7227830 B2 20070605
DOCDB simple family (application)
EP 03019679 A 20030909; DE 60333616 T 20030909; JP 2002265930 A 20020911; US 65771503 A 20030909